A method for regulating process, production, and/or actuating installation includes recording observation data records at installation components of the installation by respective recording units of the installation. The method also includes transmitting the observation data records to a central control apparatus of the installation via a field bus. The method further includes forming, at the control apparatus, associated actuating data record based on the transmitted observation data records. The method also includes transmitting the actuating data records to actuating units of the installation via filed buses. The method also includes adjusting the installation components from the actuating units based on the transmitted actuating data records. The observation data records are encrypted at the respective recording units before transmitted to the control apparatus The actuating data records are formed from the encrypted observation data records without decrypting the encrypted observation data records during the process of forming the actuating data records.